Y-adapter



FIG. 1 is a perspective view of a Y-adapter, showing my new design;

FIG. 2 is a top view of the Y-adapter shown in FIG. 1; a bottom view of the Y-adapter shown in FIG. 2 is a mirror image of the top view shown; and,

FIG. 3 is a side view of the Y-adapter shown in FIG. 1; the opposite side of the view shown in FIG. 3 is a mirror image of the side view shown.

The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a Y-adapter, as shown and described. 